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由 Noxious Ninja 发表于 May 6, 2013 · 永久链接

Really useful for testing. Unfortunately, I need to some environment sniffing, and the fact that this tool can set both useragent and navigator.platform is great.

navigator.userAgent support is currently broken due to a bug in Firefox, but it looks like that will get fixed in Firefox 22. In the meantime, you can manually go to about:config, set general.useragent.override to what you want, then restart Firefox.